Security measures have been heightened in view of the violence in the previous phases, particularly the death of five people in Cooch Behar in the fourth round of polling.
Terming Banerjee as the "Bengal Tigress", the Sena's chief spokesperson expressed solidarity with her and claimed she will win the election in her state.
The Chief Minister had said that she will hold a protest rally in Cooch Behar on Sunday against the firing incident and visit the homes of the deceased.
Four persons were killed when CISF personnel opened fire allegedly after coming under attack from locals, who "attempted to snatch their rifles" in Cooch Behar district.
The youth, identified as Anand Burman, was dragged outside polling booth number 85 in Pathantuli area of Sitalkuchi while voting was underway and shot dead.
The TMC had announced it will release its manifesto on March 9 but later decided to postpone it to March 11 due to the Kolkata fire incident which claimed nine lives.
The chief minister is at present undergoing treatment at the SSKM Hospital in Kolkata with injury to her left leg, waist, shoulder and neck, according to doctors.
Accompanied by party president Subrata Bakshi, Banerjee filed her papers at the Haldia sub-divisional office here, after taking part in a 2-km roadshow.